boto/utils.py makes use of boto.provider, but doesn't import it

This is really a dupe of bug 945355, but they plan to work around it, rather than fix it within boto.

I'm seeing issues where:

provider = boto.provider.get_default()

is called, but it isn't imported:
...
File "/usr/lib/python2.7/dist-packages/boto/utils.py", line 91, in canonical_string
provider = boto.provider.get_default()
AttributeError: 'module' object has no attribute 'provider'
...

Adding an import of boto.provider into boto/utils.py resolves this issue.

Thanks.

This is easily reproduced with:

  $ python -c 'import boto.utils; boto.utils.get_aws_metadata({})'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/boto/utils.py", line 159, in get_aws_metadata
    provider = boto.provider.get_default()
AttributeError: 'module' object has no attribute 'provider'